Improvement in harrows



UNITED STATES PATENT OFFICE.

LE ROY C. GILLASPIE, OF DENMARK, TENNESSEE.

IMPROVEMENT IN HARROWS.

Specification forming part of Letters Patent No. 29,073, dated July l0, 1860.

To all whom it may concern:

Be it known that I, L. C. GILLASPIE, ot`

Denmark, in the county ot' Madison and State of Tennessee, have invented a new and useful Improvement in Side Harrow-Heads; and I do hereby that the 'following is afull, clear, and exact description of the same, reference being had to the accompanying drawings, forming part of this specification.

Figure 1 represents a perspective view, and Figs. 2 and 3 a horizontal section and a perspective view, of the barrow-head. y

Vherever the same letters *of reference in the several figures occur they indicate corresponding parts.

The nature of my invention consists in a metallic side harrotv-head open at front and rear, and having a central oblique or diagonal slot, c c, and openings c e', in combination with a plow-beam, for the purposes hereinafter to be described.

To enable others skilled in the art to make and use my invention, I 4Will proceed to describe its construction and operation.

This barrow-head is made of a metallic frame open in front and rear, and consists ofa top, a, anda bottom plate, b, and two vertical side plates, d d, so as to form an oblong and rectangular frame, a b d d. This frame is considerablyv strengthened by two vertical partitions, c c, extending obliquelyT through the central part, a, of it, so as to form an oblique slot in the center of the frame for the insertion of the beam g. Thus the beam is inserted in the center of the barrow-head, and yet the barrow-head stands oblique in relation to the beam. The line of draft passing through the center of the barrow-head, the latter can be made much lighterthan if thebeam were attached to one of the ends ot' the oblique head. Besides, the head, consisting of a hollow frame, can be madel much lighter than if it were constructed of a solid bar.

The barrow-teeth ff f2 fsf4 are made of unequal length, the longest tooth,f, Which is to run at the'bottom of the furrow, being at one end ot the barrow-head, and the shortest tooth,f4, which is to run on the top of the hill, at the other end. The tooth fis made sharp and pointed, so as to cut Withoutthrowing up any ofthe soil, While the other teeth are made with dat shares, terminating in a point, so as to dig up the earth. The shanks of the teeth are square, and are screw-threaded at their upper ends. The square shanks are inserted through the square holes e in the bottom b of the barrow-head, while their screw-threaded upper ends pass through round holes e in the top a of the barrow-head and are fastened by screw-nuts I.

The distance between the top a and the bottom b of the harroW-head being equal to the Whole thickness ofthe beam g, the harrowteeth inserted through the holes e e in the top and bottom ot' the barrow-head are held more trmly than it' they were inserted through a solid bar of less thickness. This is another advantage ofthe hollow barrow-head above described.

The shank ot' the central barrow-tooth, f2, passes through the oblique slot and through the beam g, inserted in said slot. The bea-m and head are thus firmly secured together.

A standard, 71 extends upward from the end of the beam a, projecting in rear of the 0blique slot, and is fastened at its upper end to a horizontal brace, j. This bracej connects the upper portions of the handlest', the lower ends ot' which are secured to the beam a in front of the barrow-head.

What I claim as myinvention, and desire to secure by Letters Patent, is-

A metallic side harrow-head, a b d d, open at front and rear, and having a central oblique or diagonal slot, c c, and openings e e', in combination with a plow-beam, substantially as and for the purposes set forth.

The above specification of my improvement vin side barrow -heads signed by me this 15th day of May, 1860.

LE ROY C. GILLASPIE.

Witnesses:

GooDWIN Y. A'r LEE, GUsTAvUs DrE'rERIcH. 

